We broke down the reasons to worry about all 32 teams last week. In an effort to be fair, let's examine at least one reason for optimism for each NFL team after two preseason weeks.

Arizona Cardinals:Ryan Williams returned to the field from his torn patella tendon last week. Beanie Wells will make his preseason debut this week. Williams showed surprising wiggle for a man his size coming off surgery. He ran hard, cut well and showed great balance. He could wind up leading this promising tandem.

Baltimore Ravens: We'll spin things positive about the fact the Ravens doesn't have a true backup running back. More carries for Ray Rice. "You don't buy a new car and put it in the driveway and just park it in the garage," Ravens running backs coach Wilbert Montgomery said this week.

Buffalo Bills:Cordy Glenn has won the left tackle job. From top to bottom, the Bills' offensive line could be very good. General manager Buddy Nix has turned a longtime weakness into a potential strength.

Carolina Panthers:Luke Kuechly has come as advertised; he's all over the field. Charles Johnson looks primed for a huge season. Cam Newton made us say "wow" five times in one quarter last week. That was the highest wow-to-snap ratio in the NFL, according to Football Outsiders.

Houston Texans: The Duane Brown contract will look like a steal in time. The defense looks as scary as ever. Also: Remember when Matt Schaub's foot was a story coming into training camp? That ended fast.

Kansas City Chiefs:Jamaal Charles looks like the same guy we saw destroying defenses two seasons ago. It's been a very encouraging return from anterior cruciate ligament surgery for him. Kevin Boss also may do for the Chiefs what we thought he'd do for the Raiders.

Miami Dolphins: A lot is going wrong in Miami, but it sure looks like they got the quarterback pick right with Ryan Tannehill. That's what this whole season is about.

Minnesota Vikings:Christian Ponder has quietly been efficient and moved the ball well in both preseason games. I watched them both and don't know quite what to think. He still leaves the pocket too quickly, but there have been some positive news.

New England Patriots: The Patriots' defense looks a lot better on paper. The reports from training camp have been encouraging, and they've backed it up with two encouraging preseason games, too.

New Orleans Saints:Mark Ingram is healthy and picking up yards after contact. It hasn't shown up yet in the box score, but the Saints' backfield is going to be very dangerous.

New York Giants:Hakeem Nicks is practicing again, and David Wilson looks like an explosive backup now getting first-team reps. This offense has never been deeper. This team has never been deeper.

New York Jets: This isn't an easy team for this exercise, but LaRon Landry is finally healthy and should upgrade a weak spot at safety for the Jets. He was a huge question mark coming into camp.

Oakland Raiders:Dennis Allen just seems like he gets "it." The defensive front seven has the potential to maul people. Nothing about camp has changed our minds on this one.

San Diego Chargers: It hasn't been a great camp in San Diego. But the Chargers' defensive rookies look like they could be difference-makers on a unit that needs it.

San Francisco 49ers: Everyone at 49ers camp says that Alex Smith is playing better than ever. Jim Harbaugh calls Smith an "expert" in his offense. Is it possible that last season was the start of something special for Smith rather than a career year?

Seattle Seahawks: Last year, they had no promising quarterbacks. This year, they have two.